--- a/chm.rst	Sun Nov 28 20:49:37 2010 +0200
+++ b/chm.rst	Sun Nov 28 21:31:35 2010 +0200
@@ -1,5 +1,19 @@
 -*- mode: outline; coding: utf-8 -*-
 
+* Spec.
+
+  http://www.nongnu.org/chmspec/
+                HTML Help Projects
+  http://www.nongnu.org/chmspec/latest/
+                Unofficial (Preliminary) HTML Help Specification
+  http://www.speakeasy.org/~russotto/chm/chmformat.html
+                Matthew Russotto's Microsoft's HTML Help format description
+
+* Alternatives.
+
+  http://www.imendio.com/projects/devhelp/
+                DevHelp is a GNOME based online help system aimed toward developers
+
 * Microsoft HTML Help.
 
   http://msdn.microsoft.com/en-us/library/ms669985